Zimbra is an open source server and client technology for next-generation messaging and collaboration. Zimbra delivers innovation for both the administrator and the end-user as well as compatibility with existing infrastructure and applications (both open source and proprietary).

Zimbra is a very slick AJAX-enabled webmail and calendaring application. Unfortunately, they don't provide build packages for gentoo. In order to get it working we'll install Zimbra in an Ubuntu chroot jail.

To setup the chroot we'll be using the debootstrap program which is capable of installing a working Debian or Ubuntu distribution. The instructions below assume x86 and the latest version of Ubuntu, Dapper Drake:

root@ROCK:/zcs# ./coerce.sh
Reading package lists... Done
Building dependency tree... Done
sudo is already the newest version.
libidn11 is already the newest version.
curl is already the newest version.
fetchmail is already the newest version.
libgmp3c2 is already the newest version.
libxml2 is already the newest version.
libstdc++6 is already the newest version.
openssl is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
cat: modify.debian_version: No such file or directory
cat: modify.dpkg_status: No such file or directory

Operations logged to /tmp/install.log.5541
Checking for existing installation...
zimbra-ldap...NOT FOUND
zimbra-logger...NOT FOUND
zimbra-mta...NOT FOUND
zimbra-snmp...NOT FOUND
zimbra-store...NOT FOUND
zimbra-apache...NOT FOUND
zimbra-spell...NOT FOUND
zimbra-core...NOT FOUND

PLEASE READ THIS AGREEMENT CAREFULLY BEFORE USING THE SOFTWARE.
ZIMBRA, INC. ("ZIMBRA") WILL ONLY LICENSE THIS SOFTWARE TO YOU IF YOU
FIRST ACCEPT THE TERMS OF THIS AGREEMENT. BY DOWNLOADING OR INSTALLING
THE SOFTWARE, OR USING THE PRODUCT, YOU ARE CONSENTING TO BE BOUND BY
THIS AGREEMENT. IF YOU DO NOT AGREE TO ALL OF THE TERMS OF THIS
AGREEMENT, THEN DO NOT DOWNLOAD, INSTALL OR USE THE PRODUCT.

I followed the howto and got everything installed without errors on my Gentoo 2007.0 box + debian chroot jail for Zimbra (Zimbra 4.5.5).
I might be dumb but what's next ?
How do I access the webui of my server running in its chrooted environnment ?
Do I have to create a vhost ?

Just access it via web. it starts a webserver so you can point your browser to it

btw I had to symlink libcrypto and libssl from 0.9.8 to 0.9.7 but the packages don't seem to break, so weird case _________________Your ebuild bug is assigned maintainer-wanted? Maintain it yourself in the gentoo user overlay
http://overlays.gentoo.org/proj/sunrise | irc.freenode.net #gentoo-sunrise